528 lines
15 KiB
C++
528 lines
15 KiB
C++
/*
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* 86Box A hypervisor and IBM PC system emulator that specializes in
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* running old operating systems and software designed for IBM
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* PC systems and compatibles from 1981 through fairly recent
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* system designs based on the PCI bus.
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*
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* This file is part of the 86Box distribution.
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*
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* Interface to the YMFM External audio device (USB)
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* For OPL2Board arduino based.
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*
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* Authors: Jose Phillips, <jose@hddlive.net>
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* Adrien Moulin, <adrien@elyosh.org>
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*
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* Copyright 2024 Jose Phillips.
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* Copyright 2022 Adrien Moulin.
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*/
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#include <cstdarg>
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#include <cstdint>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include "ymfm/ymfm_opl.h"
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#include <libserialport.h>
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extern "C" {
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#define HAVE_STDARG_H
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#include <86box/86box.h>
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#include <86box/timer.h>
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#include <86box/device.h>
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#include <86box/sound.h>
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#include <86box/snd_opl.h>
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#include <86box/mem.h>
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#include <86box/rom.h>
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#include <86box/plat_unused.h>
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#include <86box/config.h>
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#include <86box/ini.h>
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#include <86box/device.h>
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// Disable c99-designator to avoid the warnings in *_ymfm_device
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#ifdef __clang__
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# if __has_warning("-Wc99-designator")
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# pragma clang diagnostic push
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# pragma clang diagnostic ignored "-Wc99-designator"
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# endif
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#endif
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}
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#define RSM_FRAC 10
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enum {
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FLAG_CYCLES = (1 << 0)
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};
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uint8_t lastval = 0x00;
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class OPLBOARDChipBase {
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public:
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OPLBOARDChipBase(UNUSED(uint32_t clock), fm_type type, uint32_t samplerate)
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: m_buf_pos(0)
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, m_flags(0)
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, m_type(type)
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, m_samplerate(samplerate)
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{
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memset(m_buffer, 0, sizeof(m_buffer));
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}
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virtual ~OPLBOARDChipBase()
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{
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}
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fm_type type() const { return m_type; }
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int8_t flags() const { return m_flags; }
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void set_do_cycles(int8_t do_cycles) { do_cycles ? m_flags |= FLAG_CYCLES : m_flags &= ~FLAG_CYCLES; }
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int32_t *buffer() const { return (int32_t *) m_buffer; }
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void reset_buffer() { m_buf_pos = 0; }
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virtual uint32_t sample_rate() const = 0;
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virtual void write(uint16_t addr, uint8_t data) = 0;
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virtual void generate(int32_t *data, uint32_t num_samples) = 0;
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virtual int32_t *update() = 0;
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virtual uint8_t read(uint16_t addr) = 0;
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virtual void set_clock(uint32_t clock) = 0;
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protected:
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int32_t m_buffer[MUSICBUFLEN * 2];
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int m_buf_pos;
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int *m_buf_pos_global;
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int8_t m_flags;
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fm_type m_type;
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uint32_t m_samplerate;
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};
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template <typename ChipType>
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class OPLBOARDChip : public OPLBOARDChipBase, public ymfm::ymfm_interface {
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public:
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OPLBOARDChip(uint32_t clock, fm_type type, uint32_t samplerate)
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: OPLBOARDChipBase(clock, type, samplerate)
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, m_chip(*this)
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, m_clock(clock)
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, m_samplerate(samplerate)
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, m_samplecnt(0)
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{
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memset(m_samples, 0, sizeof(m_samples));
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memset(m_oldsamples, 0, sizeof(m_oldsamples));
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m_rateratio = (samplerate << RSM_FRAC) / m_chip.sample_rate(m_clock);
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m_clock_us = 1000000.0 / (double) m_clock;
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m_subtract[0] = 80.0;
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m_subtract[1] = 320.0;
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m_type = type;
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m_buf_pos_global = (samplerate == FREQ_49716) ? &music_pos_global : &wavetable_pos_global;
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if (m_type == FM_YMF278B) {
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if (rom_load_linear("roms/sound/yamaha/yrw801.rom", 0, 0x200000, 0, m_yrw801) == 0) {
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fatal("YRW801 ROM image \"roms/sound/yamaha/yrw801.rom\" not found\n");
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}
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}
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timer_add(&m_timers[0], OPLBOARDChip::timer1, this, 0);
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timer_add(&m_timers[1], OPLBOARDChip::timer2, this, 0);
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}
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virtual uint32_t sample_rate() const override
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{
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return m_chip.sample_rate(m_clock);
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}
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virtual void ymfm_set_timer(uint32_t tnum, int32_t duration_in_clocks) override
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{
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if (tnum > 1)
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return;
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m_duration_in_clocks[tnum] = duration_in_clocks;
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pc_timer_t *timer = &m_timers[tnum];
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if (duration_in_clocks < 0)
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timer_stop(timer);
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else {
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double period = m_clock_us * duration_in_clocks;
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if (period < m_subtract[tnum])
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m_engine->engine_timer_expired(tnum);
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else
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timer_on_auto(timer, period);
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}
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}
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virtual void set_clock(uint32_t clock) override
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{
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m_clock = clock;
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m_clock_us = 1000000.0 / (double) m_clock;
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m_rateratio = (m_samplerate << RSM_FRAC) / m_chip.sample_rate(m_clock);
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ymfm_set_timer(0, m_duration_in_clocks[0]);
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ymfm_set_timer(1, m_duration_in_clocks[1]);
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}
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virtual void generate(int32_t *data, uint32_t num_samples) override
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{
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for (uint32_t i = 0; i < num_samples; i++) {
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m_chip.generate(&m_output);
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if ((m_type == FM_YMF278B) && (sizeof(m_output.data) > (4 * sizeof(int32_t)))) {
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if (ChipType::OUTPUTS == 1) {
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*data++ = m_output.data[4];
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*data++ = m_output.data[4];
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} else {
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*data++ = m_output.data[4];
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*data++ = m_output.data[5];
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}
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} else if (ChipType::OUTPUTS == 1) {
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*data++ = m_output.data[0];
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*data++ = m_output.data[0];
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} else {
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*data++ = m_output.data[0];
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*data++ = m_output.data[1 % ChipType::OUTPUTS];
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}
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}
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}
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#if 0
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virtual void generate_resampled(int32_t *data, uint32_t num_samples) override
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{
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if ((m_samplerate == FREQ_49716) || (m_samplerate == FREQ_44100)) {
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generate(data, num_samples);
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return;
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}
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for (uint32_t i = 0; i < num_samples; i++) {
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while (m_samplecnt >= m_rateratio) {
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m_oldsamples[0] = m_samples[0];
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m_oldsamples[1] = m_samples[1];
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m_chip.generate(&m_output);
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if ((m_type == FM_YMF278B) && (sizeof(m_output.data) > (4 * sizeof(int32_t)))) {
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if (ChipType::OUTPUTS == 1) {
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m_samples[0] = m_output.data[4];
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m_samples[1] = m_output.data[4];
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} else {
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m_samples[0] = m_output.data[4];
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m_samples[1] = m_output.data[5];
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}
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} else if (ChipType::OUTPUTS == 1) {
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m_samples[0] = m_output.data[0];
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m_samples[1] = m_output.data[0];
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} else {
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m_samples[0] = m_output.data[0];
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m_samples[1] = m_output.data[1 % ChipType::OUTPUTS];
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}
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m_samplecnt -= m_rateratio;
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}
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*data++ = ((int32_t) ((m_oldsamples[0] * (m_rateratio - m_samplecnt)
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+ m_samples[0] * m_samplecnt)
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/ m_rateratio));
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*data++ = ((int32_t) ((m_oldsamples[1] * (m_rateratio - m_samplecnt)
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+ m_samples[1] * m_samplecnt)
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/ m_rateratio));
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m_samplecnt += 1 << RSM_FRAC;
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}
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}
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#endif
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virtual int32_t *update() override
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{
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if (m_buf_pos >= *m_buf_pos_global)
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return m_buffer;
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generate(&m_buffer[m_buf_pos * 2], *m_buf_pos_global - m_buf_pos);
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for (; m_buf_pos < *m_buf_pos_global; m_buf_pos++) {
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m_buffer[m_buf_pos * 2] /= 2;
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m_buffer[(m_buf_pos * 2) + 1] /= 2;
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}
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return m_buffer;
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}
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virtual void write(uint16_t addr, uint8_t data) override
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{
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m_chip.write(addr, data);
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}
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virtual uint8_t read(uint16_t addr) override
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{
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return m_chip.read(addr);
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}
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virtual uint32_t get_special_flags(void) override
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{
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return ((m_type == FM_YMF262) || (m_type == FM_YMF289B) || (m_type == FM_YMF278B)) ? 0x8000 : 0x0000;
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}
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static void timer1(void *priv)
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{
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OPLBOARDChip<ChipType> *drv = (OPLBOARDChip<ChipType> *) priv;
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drv->m_engine->engine_timer_expired(0);
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}
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static void timer2(void *priv)
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{
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OPLBOARDChip<ChipType> *drv = (OPLBOARDChip<ChipType> *) priv;
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drv->m_engine->engine_timer_expired(1);
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}
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virtual uint8_t ymfm_external_read(ymfm::access_class type, uint32_t address) override
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{
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if (type == ymfm::access_class::ACCESS_PCM && address < 0x200000) {
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return m_yrw801[address];
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}
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return 0xFF;
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}
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private:
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ChipType m_chip;
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uint32_t m_clock;
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double m_clock_us;
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double m_subtract[2];
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typename ChipType::output_data m_output;
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pc_timer_t m_timers[2];
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int32_t m_duration_in_clocks[2]; // Needed for clock switches.
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uint32_t m_samplerate;
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// YRW801-M wavetable ROM.
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uint8_t m_yrw801[0x200000];
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// Resampling
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int32_t m_rateratio;
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int32_t m_samplecnt;
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int32_t m_oldsamples[2];
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int32_t m_samples[2];
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};
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extern "C" {
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#include <stdarg.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wchar.h>
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#define HAVE_STDARG_H
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#include "cpu.h"
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#include <86box/86box.h>
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#include <86box/io.h>
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#include <86box/snd_opl.h>
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#include <86box/device.h>
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#include <86box/config.h>
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#include <86box/ini.h>
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#ifdef ENABLE_OPL_LOG
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int oplboard_do_log = ENABLE_OPL_LOG;
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static void
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oplboard_log(const char *fmt, ...)
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{
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va_list ap;
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if (oplboard_do_log) {
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va_start(ap, fmt);
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pclog_ex(fmt, ap);
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va_end(ap);
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}
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}
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#else
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# define oplboard_log(fmt, ...)
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#endif
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struct sp_port *port;
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void opl2board_init() {
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device_add(&opl2board_device);
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const char* port_name = device_get_config_string("host_serial_path");
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device_context_restore();
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enum sp_return result;
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result = sp_get_port_by_name(port_name, &port);
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if (result != SP_OK) {
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oplboard_log("Error: Cannot find port %s\n", port_name);
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return;
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}
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result = sp_open(port, SP_MODE_READ_WRITE);
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if (result != SP_OK) {
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oplboard_log ("Error: Cannot open port %s\n", port_name);
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return;
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}
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// Set port configuration this values are hardcoded.
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sp_set_baudrate(port, 115200);
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sp_set_bits(port, 8);
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sp_set_parity(port, SP_PARITY_NONE);
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sp_set_stopbits(port, 1);
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sp_set_flowcontrol(port, SP_FLOWCONTROL_NONE);
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oplboard_log("OPL2Board Serial port %s initialized at 115200 baud.\n", port_name);
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}
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void opl2board_write(uint8_t data) {
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if (port == NULL) {
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oplboard_log(stderr, "Error: OPL2Board Port not initialized.\n");
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return;
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}
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enum sp_return result = sp_blocking_write(port, &data, sizeof(data), 1000);
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if (result < 0) {
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oplboard_log(stderr, "Error: Failed to write to OPL2Board port.\n");
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} else {
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oplboard_log("OPL2Board: data sent: %02X\n", data);
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}
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}
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void opl2board_reset() {
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// Reset all voices to 0
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oplboard_log("Performing OPL2Board reset\n");
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for (uint8_t i = 0x00; i < 0xFF; i++) {
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if (i >= 0x40 && i <= 0x55) {
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opl2board_write(i);
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opl2board_write(0x3F);
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} else {
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opl2board_write (i);
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opl2board_write(0x00);
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} }
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}
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void opl2board_close() {
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if (port != NULL) {
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opl2board_reset();
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sp_close(port);
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sp_free_port(port);
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port = NULL;
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oplboard_log("OPL2Board port closed.\n");
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}
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}
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static void *
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ymfm_opl2board_drv_init(const device_t *info)
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{
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OPLBOARDChipBase *fm;
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switch (info->local) {
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default:
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case FM_OPL2BOARD:
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fm = (OPLBOARDChipBase *) new OPLBOARDChip<ymfm::ym3812>(3579545, FM_OPL2BOARD, FREQ_49716);
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break;
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}
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fm->set_do_cycles(1);
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return fm;
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}
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static void
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ymfm_opl2board_drv_close(void *priv)
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{
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OPLBOARDChipBase *drv = (OPLBOARDChipBase *) priv;
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opl2board_close();
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if (drv != NULL)
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delete drv;
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}
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static uint8_t
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ymfm_opl2board_drv_read(uint16_t port, void *priv)
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{
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OPLBOARDChipBase *drv = (OPLBOARDChipBase *) priv;
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if ((port == 0x380) || (port == 0x381))
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port |= 4;
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/* Point to register read port. */
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if (drv->flags() & FLAG_CYCLES)
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cycles -= ((int) (isa_timing * 8));
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uint8_t ret = drv->read(port);
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drv->update();
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oplboard_log("OPLBoard read port %04x, status = %02x\n", port, ret);
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return ret;
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}
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static void
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ymfm_opl2board_drv_write(uint16_t port, uint8_t val, void *priv)
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{
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OPLBOARDChipBase *drv = (OPLBOARDChipBase *) priv;
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oplboard_log("OPLBoard write port %04x value = %02x\n", port, val);
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if ((port == 0x380) || (port == 0x381))
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port |= 4;
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// Allow initialization of adlib
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if ((val == 0x04 || val == 0x02) || (lastval == 0x04 || lastval == 0x02))
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drv->write(port, val);
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lastval = val;
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opl2board_write(val);
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drv->update();
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}
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static int32_t *
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ymfm_opl2board_drv_update(void *priv)
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{
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if (port == NULL) {
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opl2board_init();
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opl2board_reset();
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}
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OPLBOARDChipBase *drv = (OPLBOARDChipBase *) priv;
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return drv->update();
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}
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static void
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ymfm_opl2board_drv_reset_buffer(void *priv)
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{
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OPLBOARDChipBase *drv = (OPLBOARDChipBase *) priv;
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drv->reset_buffer();
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}
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static void
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ymfm_opl2board_drv_set_do_cycles(void *priv, int8_t do_cycles)
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{
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OPLBOARDChipBase *drv = (OPLBOARDChipBase *) priv;
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drv->set_do_cycles(do_cycles);
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}
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static void
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ymfm_opl2board_drv_generate(void *priv, int32_t *data, uint32_t num_samples)
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{
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OPLBOARDChipBase *drv = (OPLBOARDChipBase *) priv;
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// drv->generate_resampled(data, num_samples);
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drv->generate(data, num_samples);
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}
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const device_t ym_opl2board_device = {
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.name = "YMOPL2Board (External Device)",
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.internal_name = "ym_opl2board_device",
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.flags = 0,
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.local = FM_OPL2BOARD,
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.init = ymfm_opl2board_drv_init,
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|
.close = ymfm_opl2board_drv_close,
|
|
.reset = NULL,
|
|
.available = NULL,
|
|
.speed_changed = NULL,
|
|
.force_redraw = NULL,
|
|
.config = NULL
|
|
};
|
|
|
|
const fm_drv_t ymfm_opl2board_drv {
|
|
.read = &ymfm_opl2board_drv_read,
|
|
.write = &ymfm_opl2board_drv_write,
|
|
.update = &ymfm_opl2board_drv_update,
|
|
.reset_buffer = &ymfm_opl2board_drv_reset_buffer,
|
|
.set_do_cycles = &ymfm_opl2board_drv_set_do_cycles,
|
|
.priv = NULL,
|
|
.generate = ymfm_opl2board_drv_generate
|
|
};
|
|
|
|
#ifdef __clang__
|
|
# if __has_warning("-Wc99-designator")
|
|
# pragma clang diagnostic pop
|
|
# endif
|
|
#endif
|
|
|
|
}
|